With the president's harsh warning, however, he completely reversed the argument that the Muslim ban is not a ban. And the American Civil Liberties Union tweeted back in response to Trump's claim that the Muslim was a ban.

Last week, in response to the Manchester suicide bombing, Homeland Security Secretary John Kelly argued on Fox News Sunday that there was no travel ban.

The fact is that in those countries, we have very little ability to actually verify, vet the people that are coming out of those countries. So, what the president and it's not a travel ban, remember. It’s the travel pause. What the president said, for 90 days, we were going to pause in terms of people from those countries coming to the United States that would give me time to look at additional vetting to see.

Is there an impasse on the ban because someone's story doesn't line up inside the White House?

Cecillia Wang, the deputy legal director of the ACLU, wrote the tweet that shaded the president. "We need to be outraged when the president exploits a terrible violent crime to push his discriminatory and illegal policy."

Trump's unsupervised tweet was followed up Sunday morning, saying, "Whatever the United States can do to help out in London and the U. K., we will be there - WE ARE WITH YOU. GOD BLESS!"

Minutes later, he tweeted, "We must stop being politically correct and get down to the business of security for our people. If we don't get smart it will only get worse."

And while he was on a roll, he casually reminded us on another issue with this latest tweet: